Telcel America offers several service plans that include international calls as part of a package of bundled services as of 2015. While these service plans only allow calls to specific destinations and are subject to change, most offer unlimited international calling.
Telcel America's Plus Plan Unlimited and Unlimited International Plan both offer an allotment of minutes to Mexico and Claro Guatemala and unlimited calls to other designation regions. This allotment is based on the price point of the plan, for each of which there are two. The same applies to the Basic International Plan, but it does not offer unlimited international calling.